NPTEL Lecture : 'Trigonometry and Spherical Trigonometry 1'
Trigonometry and Spherical Trigonometry 1
Watch Mathematics in India - From Vedic Period to Modern Times ('Mathematics' course from IIT Bombay) Video Lectures
by Prof. M.D.Srinivas, Prof.K.Ramasubramanian, Prof.M.S.Sriram.